4 * 4000mAh ER18505 Li-SOCl2 Replaceable Batteries
Battery Life: Around 3 Years (10 min Interval)
Built-in Multiple Sensors including NH3, H2S, Temperature and Humidity
Equipped with Buzzer and LED Indicator to Indicate Threshold Alarms
Support Milesight D2D Protocol
Damp-proof Coating
NFC Enabled